Re: [PATCH] Fix kunmap_atomic's use of kpte_clear_flush()

On Tue, 2006-11-07 at 16:22 -0800, Jeremy Fitzhardinge wrote:
> kunmap_atomic() will call kpte_clear_flush with vaddr/ptep arguments
> which don't correspond if the vaddr is just a normal lowmem address
> (ie, not in the KMAP area).  This patch makes sure that the pte is
> only cleared if kmap area was actually used for the mapping.

Or in other words, if kmap_atomic() does nothing, kunmap_atomic() should
do nothing.

Rusty.


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